The current stable version of Compass (version 0.12.2) was released in June of 2012, and so it doesn't support the new maps functionality of Sass v3.3.0. (Sassmeister is currently using v1.0.0.alpha18 of Compass, which is why your Sass compiles there.)
Install the latest beta version of Compass:
gem install compass --pre
which is version 1.0.0.alpha.19 (March 2014).